-LRB- CNN -RRB- -- San Francisco police say they are investigating an allegation of sexual abuse against 49ers wide receiver Michael Crabtree .

The inquiry comes as the San Francisco football team is preparing for an important playoff game .

`` Michael Crabtree has been interviewed with his lawyer present and has cooperated in this investigation , '' a San Francisco police statement said . `` Michael Crabtree has not been detained or arrested and has agreed to make himself available to investigators in the future . ''

The complaint is about an alleged assault that occurred in a San Francisco hotel Sunday morning , police said .

A day before , the 49ers scored a playoff victory , beating the Green Bay Packers at Candlestick Park in San Francisco .

Crabtree had two touchdowns in the game , continuing his sterling play that has propelled him to being the team 's best wide receiver this year .

`` We are aware of the allegation against Michael and understand that he has fully cooperated with authorities , '' 49ers General Manager Trent Baalke said . `` The 49ers take such matters very seriously . We will have no further comment at this time as the legal process is ongoing . ''

The 49ers will play the Atlanta Falcons on Sunday with the winner going to the Super Bowl .

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Crabtree has not been arrested , police say

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The complaint is about an alleged sexual abuse that occurred in a San Francisco hotel

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Police say the wide receiver has been interviewed

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`` The 49ers take such matters very seriously , '' the teams says